Abstract
Considering the characteristics of China's high-speed railway network and the allocation structure of Electric Multiple Units (EMUs), the EMUs operation management mode provides an effective technical route for EMUs route planning optimization. To reduce the number of EMUs, key factors such as the EMUs mileage, time limit, maintenance model, maintenance capability, night accommodation capacity, maintenance management mode, and train tasks are considered as constraints. The number of maintenance tasks is also the objective so that the EMUs route planning solution method is more integrated with actual production needs, and an optimization model of EMUs route planning is established to overcome the shortcomings of previous studies that did not sufficiently consider EMUs maintenance. To verify the feasibility and effectiveness of the proposed model and method of the proposed two-stage optimization algorithm based on column generation, a case study on the preparation of EMUs circulation planning for the Beijing-Shanghai high-speed railway network is conducted, and the results are analyzed.
Highlights
The EMUs (Electric Multiple Units) utilization problem studies the management measures that improve the operation efficiency of a high-speed railway by considering EMUs management regulation, train timetable requirement, etc
By combining the current EMUs resource allocation conditions and management modes of China’s high-speed railway system, this paper constructs a train connection network that considers various practical operation management measures based on considerations such as breaking through the restrictions of a maintenance management system, introducing a collaborative maintenance mode and extending the mileage limit
Regarding the minimum number of EMUs and the number of maintenance tasks as objectives, we consider the constraints of the maintenance mode, maintenance capability, and flexible EMUs route optimization to model the problem, and an optimization algorithm based on a two-stage concept is proposed
Summary
The EMUs (Electric Multiple Units) utilization problem studies the management measures that improve the operation efficiency of a high-speed railway by considering EMUs management regulation, train timetable requirement, etc. In addition to considering the modes of EMUs allocation, operation, maintenance, backup and train unit composition, the constraints of the EMUs maintenance mileage, maintenance time interval, EMUs type restrictions, maintenance capability, night accommodation capacity, and train tasks given in a timetable are considered to optimize EMUs utilization efficiency, reasonably exploit the maintenance. The EMUs circulation plan optimization problem provides EMUs with the train connection schedules and daily maintenance location plans that satisfy the train operation demand and the EMUs maintenance regulations by considering the EMUs allocation and management modes.
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